CN219623181U - Differential mechanism with split type casing - Google Patents

Abstract

The utility model provides a differential with split type shells, which comprises a main gear reduction ring, a differential shell, a half-shaft gear and a planetary gear, wherein the differential shell comprises two parts which are connected with each other, namely a gear ring side shell close to the main gear reduction ring and a non-gear ring side shell far from the main gear reduction ring; the gear ring side shell is integrated with the main gear reduction ring. The differential mechanism shell is divided into two parts which are close to the main gear reduction ring and far away from the main gear reduction ring, so that the technical problems of complex internal finishing process, low processing efficiency and high cost of the blank cavity of the existing integral differential mechanism shell are solved, and after the differential mechanism shell is divided into two parts, the internal finishing process of the shell cavity is simpler, and the processing efficiency is improved. The gear ring side shell and the main gear reduction ring are integrated, so that the bolt connection is not needed, and the integral weight of the differential is reduced; and the welding connection is not needed, so that potential failure risks caused by welding cracks are avoided. Has good popularization and application value.

Description

Differential mechanism with split type casing

Technical Field

The utility model relates to the technical field of differentials, in particular to a differential with a split type shell.

Background

The differential mechanism is a core component for realizing different rotation speeds of left and right wheels when an automobile turns. The existing differential consists of a differential main reduction gear ring, a differential shell, a half-shaft gear, a planetary gear shaft and other parts. In the prior art, a differential housing is integrally cast by cast iron, a main differential gear reduction ring is formed by forging forged steel, and the main differential gear reduction ring is connected with the differential housing by welding or bolting and the like.

When the main gear reduction ring of the differential mechanism is connected with the differential mechanism shell through bolts, on one hand, the integral weight is increased, and on the other hand, the assembly procedure of the differential mechanism is increased, the production period is longer, and the cost is higher. When the differential mechanism main gear reducing ring and the differential mechanism shell are connected through welding, as the differential mechanism main gear reducing ring and the shell are made of forged steel and cast iron respectively, welding of different materials easily causes welding cracking, and potential failure risk is high when the differential mechanism works. The differential mechanism casing is cast molding, and cast iron material performance is relatively poor, and very easily produces the casting defect in the casing when the casing casts, causes differential mechanism casing potential failure risk higher, causes the product reliability lower, is difficult to satisfy car and spare part high reliability development trend, and shell integral type casting blank intracavity finish machining technology is complicated simultaneously, and machining efficiency is low, with high costs.

Disclosure of Invention

According to the defects that the differential mechanism shell manufactured by using a casting method in the prior art is poor in material performance and high in failure risk, and the differential mechanism shell is connected with a main gear reduction ring of the differential mechanism through bolts or welded connection and the like to influence the performance of the differential mechanism, the differential mechanism with the split type shell is provided.

The above object of the present utility model is achieved by the following technical solutions:

the differential with the split type shell comprises a main gear reduction ring, a differential shell, a half-shaft gear and a planetary gear, wherein the differential shell comprises two parts which are connected with each other, namely a gear ring side shell close to the main gear reduction ring and a non-gear ring side shell far from the main gear reduction ring; the gear ring side shell is integrated with the main gear reduction ring.

The differential mechanism casing is divided into two parts which are close to the main gear reduction ring and far away from the main gear reduction ring, the technical problems of complex internal finishing process, low processing efficiency and high cost of the blank cavity of the existing integrated differential mechanism casing are solved, and after the differential mechanism casing is divided into two parts, the internal finishing process of the casing cavity is simpler, and the processing efficiency is improved.

On the other hand, the gear ring side shell and the main gear reduction ring are integrated, so that the bolt connection is not needed, and the integral weight of the differential is reduced; and the welding connection is not needed, so that potential failure risks caused by welding cracks are avoided.

Further, the material of the gear ring side shell is forged steel, and the gear ring side shell and the main gear reduction gear ring are integrally formed by forging.

The main gear reduction ring in the prior art is made of forged steel, and the structural shape of the differential housing in the prior art is inconvenient to forge and mold, so that cast iron is adopted for casting and molding. Compared with cast iron, the forged steel has better performance, the differential shell is divided into two parts, the gear ring side shell of the differential shell and the main gear reduction ring are integrated, the forging forming can be realized integrally, and the casting defect is avoided.

Preferably, the split section is parallel to the end face of the primary ring gear, and the split position is transverse to the two planetary gear mounting locations on the differential housing. The planetary gear installation position is an installation hole, the position shell is gradually transited from an arc to a straight line and is perpendicular to the main gear reduction ring, and the position shell is split and convenient to forge.

Preferably, the differential case is split into two parts from a position near the ring gear of the primary reduction.

Further, the material of the non-ring gear side housing is also forged steel, and the non-ring gear side housing is formed by forging.

After the differential mechanism shell is divided into two parts, each part can be forged and formed, and the forged steel has better performance than cast iron.

Further, the ring gear side case and the non-ring gear side case are connected by welding.

The gear ring side shell and the non-gear ring side shell are made of forged steel and are identical in material, so that the gear ring side shell and the non-gear ring side shell can be connected in a welding mode, and welding performance of the same material is superior to that of welding of different materials.

Compared with the prior art, the utility model has the following beneficial effects:

the differential with the split type casing not only enables the differential casing to be forged and formed by forging steel, but also enables the differential casing and the main gear reduction ring to be connected without welding or fastening pieces. The method comprises the following steps: the differential mechanism shell formed by traditional integral casting is designed in a split mode, wherein the gear ring side shell comprises a differential mechanism main reduction gear ring which is formed by integral forging, so that the failure risk of the differential mechanism main reduction gear ring which is required to be connected with the differential mechanism shell through bolts or welding is avoided; the non-gear ring side shell is formed by forging alone, and blanks of the two parts of shells are formed into the differential shell by welding after semi-finishing, so that the defect of poor performance of castings is overcome.

The split differential mechanism housing has simple internal finishing process, high processing efficiency, high precision and low cost. The shell split design makes the shell blank structure simpler, can improve the life and the blank qualification rate of shell blank forging mould greatly, reduction in production cost.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 is a structural view of a primary ring gear and a differential case of the present utility model.

Fig. 2 is an exploded view of the main ring gear and differential housing of the present utility model.

Fig. 3 is a structural diagram of the ring gear side case and the ring gear main reducing gear.

Fig. 4 is a non-ring gear side housing structural view.

A main reduction gear ring-1, a gear ring side shell-2, a non-gear ring side shell-3, a welding seam position-4, a planetary gear installation position-5 and a half shaft gear installation position-6.

Detailed Description

Embodiments of the utility model are described in detail below with reference to the attached drawings, but the utility model can be implemented in a number of different ways, which are defined and covered by the claims.

Example 1

In the differential mechanism in the prior art, a main gear reduction ring is formed by forging forged steel, a differential mechanism shell is formed by casting cast iron, and the main gear reduction ring is connected with the differential mechanism shell by using bolts or welding. The forged steel has better performance than cast iron, but the differential housing is a cavity, so the forged steel cannot be formed in a forging mode, the main reduction gear ring and the differential housing are easy to crack due to different welding, and the material performance of the casting is not superior; when the automobile runs, the main gear reduction ring rotates at a high speed, and the potential failure risk of the main gear reduction ring and the differential shell is high due to the fact that the bolts are used for connection. And the differential mechanism shell is a cavity, so that the intracavity finishing process is complex, the processing efficiency is low, and the cost is high.

In summary, the above problems greatly affect the performance and service life of the differential, which is a technical problem to be solved. The utility model aims at the technical problems, optimizes the structure of the differential mechanism and improves the overall quality of the differential mechanism. The following is a detailed analysis with reference to the accompanying drawings:

a differential having a split housing includes a main ring gear, a differential housing, a side gear, and a planetary gear. As shown in fig. 1, which shows the structure of a differential case and a main ring gear reduction, the differential case includes two parts connected to each other, namely a ring gear side case 2 close to the main ring gear reduction and a non-ring gear side case 3 away from the main ring gear; the ring gear side housing 2 is integrated with the main ring gear 1.

The material of the gear ring side housing 2 is also forged steel, and the gear ring side housing 2 and the main ring gear 1 are integrally formed by forging.

As shown in fig. 2, the split section is parallel to the end face of the main ring gear 1, and the split position crosses two planetary gear mounting positions 5 on the differential case.

As shown in fig. 3, the differential case is split into two parts from a position near the ring gear of the primary reduction.

The material of the non-ring gear side case 3 is also forged steel, and the non-ring gear side case 3 is formed by forging.

The ring gear side case 2 and the non-ring gear side case 3 are connected by welding.

The differential housing is divided into two parts, one of which is integrated with the main ring gear, and is also made of forged steel, and is forged with the main ring gear during manufacturing. The shell and the main reducing gear ring are connected in a welding mode without using a fastener or a welding method, meanwhile, the shell on the gear ring side and the shell on the non-gear ring side are made of the same forged steel material, and are connected in a welding mode, so that the welding performance is superior compared with welding of different materials. Furthermore, the split type differential mechanism shell is not provided with a cavity, so that the two parts of the differential mechanism shell are formed by forging forged steel, and the split type structure is simple in finish machining process.

The differential with the split type shell has the advantages of stable structure and simple processing technology; the automobile is not required to be connected by bolts and other fasteners, the whole structure is simplified, the automobile light weight development trend is met, and meanwhile, the reliability of the product is greatly improved.

The welding seam position of the differential mechanism shell is adjusted according to differential mechanism shells with different structures, and any differential mechanism shell is subjected to split forging and welding forming is within the protection scope of the utility model.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the scope of the present utility model.

Claims (3)

1. The differential mechanism with the split type shell comprises a main gear reduction ring, a differential mechanism shell, a half-shaft gear and a planetary gear, and is characterized in that the differential mechanism shell comprises two parts which are connected with each other, namely a gear ring side shell close to the main gear reduction ring and a non-gear ring side shell far from the main gear reduction ring; the gear ring side shell and the main gear reduction ring are integrated; the gear ring side shell is made of forged steel, and the gear ring side shell and the main gear reduction ring are integrally formed by forging; the material of the non-gear ring side shell is forged steel, and the non-gear ring side shell is formed by forging; the gear ring side housing and the non-gear ring side housing are connected by welding.

2. A differential having a split housing as defined in claim 1 wherein the split section is parallel to the main ring gear face and the split position is transverse to the two planetary gear mounting locations on the differential housing.

3. A differential having a split housing as defined in claim 2, wherein said differential housing is split into two parts from a position adjacent to a ring gear of a primary reduction.